Related Directory Categories
Sources
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
Octans
From Wikipedia, the free encyclopedia
- The Octans is also a training vessel from the Maritime Institute Willem Barentsz. See: www.mi.nhl.nl
 Click for larger image |
|
| List of stars in Octans | |
| Abbreviation: | Oct |
| Genitive: | Octantis |
| Symbology: | the Octant |
| Right ascension: | 22 h |
| Declination: | −90° |
| Area: | 291 sq. deg. (50th) |
| Main stars: | 3 |
| Bayer/Flamsteed stars: | 27 |
| Stars known to have planets: | 2 |
| Bright stars: | 0 |
| Nearby stars: | 0 |
| Brightest star: | ν Octantis (3.73m) |
| Nearest star: | HD 212168 (75.2 ly) |
| Messier objects: | 0 |
| Meteor showers: | ????? |
| Bordering constellations: | Tucana Indus Pavo Apus Chamaeleon Mensa Hydrus |
| Visible at latitudes between +0° and −90° Best visible at 21:00 (9 p.m.) during the month of October |
|
| Circumpolar. | |
Octans (pronounced /ˈɒktænz/, Latin: eighth part of a circle, alluding to octant (instrument)) is an inconspicuous constellation introduced by Nicolas Louis de Lacaille. It is notable mainly as the location of the south celestial pole. Its star Sigma Octantis (σ Oct) is the closest naked-eye star to the pole, but it is so faint that it is practically useless as a polar star for navigation purposes. Fortunately, the constellation Crux, the Southern Cross, points at the pole.
The constellation is circumpolar to the South Celestial Pole, so it can be seen in Southern Hemisphere skies during the evening in any month of the year. The Right Ascension and month of best visibility given are for the three brightest stars, which are at their highest in the sky during the evening in November.
Since Octans was introduced in the 18th century, and lies near the southern pole, it was not known to classical or early cultures, and so they produced no mythology concerning it.
- Ian Ridpath and Wil Tirion (2007). Collins Stars and Planets Guide, HarperCollins, London. ISBN 978-0007251209.
- The Deep Photographic Guide to the Constellations: Octans
- Starry Night Photography : Octans
- Star Tales – Octans
- The Octans is also a trainingvessel for the Maritime Institute Willen Barentz
|
|
|---|
| Andromeda • Antlia • Apus • Aquarius • Aquila • Ara • Aries • Auriga • Boötes • Caelum • Camelopardalis • Cancer • Canes Venatici • Canis Major • Canis Minor • Capricornus • Carina • Cassiopeia • Centaurus • Cepheus • Cetus • Chamaeleon • Circinus • Columba • Coma Berenices • Corona Australis • Corona Borealis • Corvus • Crater • Crux • Cygnus • Delphinus • Dorado • Draco • Equuleus • Eridanus • Fornax • Gemini • Grus • Hercules • Horologium • Hydra • Hydrus • Indus • Lacerta • Leo • Leo Minor • Lepus • Libra • Lupus • Lynx • Lyra • Mensa • Microscopium • Monoceros • Musca • Norma • Octans • Ophiuchus • Orion • Pavo • Pegasus • Perseus • Phoenix • Pictor • Pisces • Piscis Austrinus • Puppis • Pyxis • Reticulum • Sagitta • Sagittarius • Scorpius • Sculptor • Scutum • Serpens • Sextans • Taurus • Telescopium • Triangulum • Triangulum Australe • Tucana • Ursa Major • Ursa Minor • Vela • Virgo • Volans • Vulpecula |
